@ultimatehaki Actually, you darn people to heck. Damnation is for Hell. Phil, the Prince of Insufficient Light with his pitchspoon, Darns people to Heck.
Did the friend say this to help? I have doubts. I bet that Non-cham at some point will reappear just like the girl who said that Tadano was shameful. In fact she said that Tadano chuunibyou's attitudes were shameful.
@TrueGoddessReincarnation We see them in the first couple of chapters, so they're not completely out of the blue. But yeah, they did not have a lot of screen time so far.